Dahua NVR21-4KS3 Series - NVR52-4 KS2;NVR52-8 P-4 KS2;NVR52-16 P-4 KS2;NVR52-24 P-4 KS2;NVR52-8 P-4 KS2 E;NVR52- 16 P-4 KS2 E Series; Nvr42-4 Ks2;Nvr42-P-4 Ks2;Nvr42-8 P-4 Ks2;Nvr42-16 P-4 Ks2;Nvr42-4 Ks2;L;Nvr42-P- 4 Ks2;L;Nvr42-8 P-4 Ks2;L;Nvr42-16 P-4 Ks2;L;Nvr42-Ei;Nvr42-P-Ei;Nvr42-8 P-Ei;Nvr42- 16 P-Ei

User's Manual
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3.5.5 NVR52-4KS2/NVR52-8P-4KS2/NVR52-16P-4KS2/NVR52-24P-
4KS2/NVR52-8P-4KS2E/NVR52-16P-4KS2E Series
Figure 3-52 Typical connection
3.5.6 NVR42-4KS2/NVR42-P-4KS2/NVR42-8P-4KS2/NVR42-16P-
4KS2/NVR42-4KS2/L/NVR42-P-4KS2/L/NVR42-8P-4KS2/L/NVR42-